#include <REGX52.H>
#include <INTRINS.H>


void Delay500us()		//@12.000MHz
{
	unsigned char i;

	_nop_();
	i = 247;
	while (--i);
}




void main(void){
	unsigned int i=0;
	while(1){
			for(i=0;i<1000;i++){
				P2_5 = ~P2_5;
				Delay500us();
			}
	}
}
	